Drilling-machine.



M. W. SHBRWOOD.

DRILLING MACHINE.

APPLICATION FILED JAH. 1o. 1914` JMW, ha

M. W. SHERWOOD.

DRILLING MAGHINE.

APPLIGATION FILED JAN. 10, 19MLy 3 SHEETB-SEEET 2.

latented Nov. 3, 1914 SHEETS SHTJT .5.

Pateued Nov. 3, 1914.

M. W. SHERWOD.

DRILLING MACHINE.

APPLICATION PIL.BDJAN.10.1914.

lll'l SllrlllilS PAENT Uhl IIIATHER W. SHERWOLD, 0F FRANKLIN,

PENNSYLVlL'NIA, ASSIGNGR I CHICAGO PNEUMATIC TOOL COMPANY, OF CHICAGO,ILLINOIS,A A COHFORATION E NEW' JERSEY.

DRIDLNG-JYIACHINE.

rasanten Nav., a, raie.

Application lcil January 10, 1914. Serialio. `811,340.

To all whom t maf concern:

Be it known tlat I, Murrina W. SHER- woon, a citizen of the UnitedStates, residing at Franklin, Vcnango county,`lfei1nsyl-` Vania,` haveinvented certain new and usc ful Improvements in Drilli11g-l\/lachincs,of which the following is a specification.

My `invention relates generally to drilling machines and moreparticularly but not necessarily to rock drills of the hammering pistontype.

The object of my-invcntion is in general to provide a simple', eilicicntand reliable machine of this character, and in particular to improve theconstruction of the fluid pressure controlled means and associated partswhich operate and drive the rotary drill chuck.

Another' object of-iny invention is to provide simple and improved meansfor connecting together the main cylinder and front head and to combinesuch means with certain parts cooperating with the said fluid pressurecontrolled means.

Still another object of my invention is to provide a simple andeilicient packing between the front head ot the machine and the outerend of the drill chuck.

Other novel and advantageous features ol construction and operation willbe apparent from the description hereinafter given.

In the drawings Figure .l is a central longitudinal sectional elevationof a drilling machine illustrating one embodiment of :my invention; Fig.2 an elevation thereof; Figs. 3 and l cross sections on the line 3MB and4-4 respectively of Fig. 2; Fig. 5 a detail view of the bushing betweenthe cylinderl and the head; Fig. 6 a cross section on the line 6--6 ofFig. l showing the packing at the front end of the drill socket; Fig. 7a longitudinal section ci 'the lower end of the mam cylinder andthetrout head and drill socket on. a larger scale than Fig. l, and Fig. 8 adetail section illustrating one of the pairl of modified form ofclampingr bolts employed. v

Referring to the particular' embodiment ont my invention. illustrated inFigs. 1 to Ll,

my drilling machine comprises a cylinder 1,

a piston 2 reciprocable therein, a striking piece or anvil 3, a fronthead 4., a bushing 5 interposed between the cylinder` and rthe fronthead, a rotatable drill socket 6, drill bit or steel 7, the side bolts 8and cushion springs 9 on said bolts, together with fluid pressuremechanism for rotating the socket comprising a pair of pistons 10arranged in head and having the ratchet drive connec-I tion with thedrill socket as hereinafter c'plained. The piston is operated by mo-(not shown but contained within the casing 12) through suitable portsand passages leading to and from o posite ends of the main cylinder,.but as t lese ports-and passages may be of any suitable arrangeabletype well known in tiis art, the same need not be illustrated ordescribed. The bushing 5 which is adapted to fit into the front end ofthe cylinder and also within the rotatable socket is provided with acentral opening in line with the axis of the main cylirider and itspiston in order to receive the anvil 3 which conununicates the blows ofthe piston to the inner end of the drill steel or bit 7. The front headi is cylindrical at its outer end to receive the cylindrical front endof the drill socket which rotates therewitliin. Between the front end olthe socket and the annular shoulder t of the front head is interifosedpacking which here consists, as sllpwn in detail in Fig. 6, of acircular washer 13; of '.t'elt or the like and a flat spring;r ift, theconstruction and arrangement of this packing being such that chips areprevented from getting into the bearing between the head and the drillsocket or sleeve As stated the cylinders 1l are formed on opposite sidesof: the front head aal the ends of these cylinders are closed b):siniilar caps 15 which tit closely therein but are not screwed in asusual, the same being readily inscrtible and removable. These caps areheld in place by means oi yokes 16, the outer ends olE each one ol whichare adapted to bear against the outer faces of cylinders 1l. on oppositesides. of the fronttlve fluid controlled by a. distribution valveY mentand as the valve mav be of any suit? Suid cylmdfs, *jokes arranged and.bolts passing opeme wth @d ou and u cprocmjted by Mw p tous 10, Thesepnwg ha 'I am normally 5)1"1ng-pfvss4 im@ engage hold the heads 1n placement wjgll the ratchet te@ ij by means of ,e 'hm 45h@ yokes. springs nadjion pmvie sckmg E1n drill, th@ combinaon with a. 'humm lags 'whichare 5pm .l-p sssed by the men." c'yndel and is 'hammer and with thesprings, 2&3 inta engngemem with h@ 1*: @het from head herfeo 01"' bolts01* securing; the teleth. Alwse dogs are mfmb'e im n piane Ruda@ andhead 'ogthen L d r Socket pm'ael mth ghe of the piston. and the mountedun 110mm in said head., ud com oute ends of 'the Spying@ bmf a, 'mila'Hm mcfsrl mechanism "mmmec in the head :fof:

'remowc for simi p'mmm :md heads) for auch Chai The oppo@ ends; @L mc:@A connecksd 31,

fiers il 1 und yokeef bemin@ .imgfg hum m pince? sind bolts pa 3. En a.Erm-4, 'the cm'rbnaton with a ha;

admit the Huid p mi the main @jl/hud x" on@ C311* "umg imm?, theueof, ofbos 'fr securing ma uder 11, and *ah-'3 oppfusm': i Q, u anni head'ogthem drill scke d'v', the combination with ham-- head, mud son l infina hem mid.

Mata 'ogge w L- emay mas kw Mr 'whip t3 rum 1,1m, um l @im tween thelugs und yhim/ing .:olivespondng nimm-11.1525" the @mds i swirl ymkesx'bearing l ust the cylinder .l azules, um@ hollow drift pms in mid yoke,openings; through which i Smid bolts; pasas.

In a, drm, the combxmton 0i CyL limer, L from; hemd, a, rotatmg dullsocket

